DH110 ORAL HISTOLOGY AND EMBRYOLOGY Lesson 9 Tammy Fisher RDH BS Salivary Glands, Tonsils and Biofilm.

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Presentation transcript:

DH110 ORAL HISTOLOGY AND EMBRYOLOGY Lesson 9 Tammy Fisher RDH BS Salivary Glands, Tonsils and Biofilm

ROLL CALL Will you give me a constructive comment about this class?

Let’s Get Started Lesson 9 Objectives Don’t forget the Smile Train donations! Homework #4 graded and returned last week Homework #5 part #3 returned Homework #5 part 4 due next week after final

Quiz 4 Review Chapters Periodontal Ligament Alveolar Process and Cementum Tempomandibular Joint Oral Mucosa

Acquired Pellicle (Non- mineralized) A tenacious membranous layer that is amorphous, acellular, and organic. Composed primarily of glycoproteins from saliva absorbed by the hydroxyapatite of the tooth surface. Forms over exposed tooth surfaces, as well as over restorations & dental calculus. Formed within minutes after removal.

Soft Deposits Acquired pellicle or cuticle, dental biofilm, materia alba, and food debris, each of which is an entity.

Microbial biofilm (Non- mineralized) Dense, organized bacterial systems embedded in an intermicrobial matrix that adhere closely to the teeth, calculus, and other surfaces in the oral cavity. * not easily removed with water irrigation

Materia alba (Non- mineralized) Loosely adherent, unstructured, white or grayish-white or cream-colored cheesy mass of oral debris & bacteria that lies over dental biofilm. *Can be removed with vigorous rinsing & water irrigation

Food debris (Non- mineralized) Unstructured, loosely attached particulate matter. Self-cleansing activity of tongue & saliva & rinsing vigorously remove debris.

Calculus (Mineralized) Calcified dental biofilm; hard, tenacious mass that forms on the clinical crowns of the natural teeth & on dentures & other appliances. (biofilm mineralization)

Significance of pellicle 1. Protection - barrier against acids 2. Lubrication - keeps surface moist 3. Nidus for bacteria - aiding the adherence 4. Attachment of calculus - like double stick tape

Stages in the formation of biofilm Formed in three basic steps: 1. Pellicle formation 2. Bacterial multiplication & colonization 3. Biofilm maturation (matrix formation)

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